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N-PETERS. FHOTOiITHOGRAPNE. WASHINGTON. D. C.

UNITED STATES PATENT OFFTCE.

E. MATTESON, OF DAYTON,

NEW YORK, AND W. M. PARRIS, OF DORSET, AND HERVEY PARRIS, OF PAVLET, VERMONT.

ROTARY STEAM-ENGINE.

. Specification of Letters Patent No.

To all whom it may concern:

Be it known that we, ELIAS MATTEsoN,'of Dayton, in the county of Cattaraugus, and State of New York, and WV. M. Parmis, of Dorset, in the county of Bennington and State of Vermont, and HERVEY PARRIS, of Pawlet, inthe county of Rutland and State of Vermont, have invented certain new and useful Improvements in Rotary Steam-Engines; and we do hereby declare that the following is a full, clear, and exact description of t-he construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a side view; Fig. 2, a side view of the main steam wheel in connection with the rotary steam abutments; Fig. 3, an end view; Fig. 4, a sect-ion of the main steam wheel inverted; Fig. 5, one of the rotary steam abutments; Fig. 6, one of the caps which form the periphery of the steam chamber; Fig. 7, a packing plate; Fig. 8, the reverse gate or valve; Fig. 9, the cutoff ellipsis and balance beam; Fig. 10, the cutoftI crank and roller.

Like letters refer to like parts in all the drawings of which- A is the framework; F, the main shaft to which is attached the di'erent parts comprising the main steam wheel; Gr, another shaft to which is attached t-he rotary steam abutments C, which are made to fit the bottom and sides of the annular' steam chambers 11. The abutments and steam wheel work together in the manner of friction rollers and are secured from sliding againsteach other, by cog wheels w, the abutments and steam wheel being of equal diameter or of such proportionable size as will insure the steam floats or pistons a ato pass the abutments in the slots or openings g g made for that purpose said floats or pistons being fixed one in each steam chamber and on opposite sides of the steam wheel, so that when one is passing the abutment the other is being acted upon by the steam. The part d d is a duplicate of E Fig. 4L out to the groove e e and when placed on the shaft facing each other with the partition 'in m between them form within two air chambers lc lc, their openings o b, being on opposite sides of the steam piston, through which opening the steam alternately passes as the engine is reversed and comes in contact with the sliding 13,768, dated November 6, 1855.

piston c c, which works` against confined air and prevents sudden jerks and starts of the engine, said a-ir cylinders or chambers being annular and filled with air compressed to any given degree which will Arender its expansive force against the sliding air pistons when at rest nearly equal to that exerted by the steam on its opposite side after it has become exhausted by expansion under a cutoff down to that degree of pressure in which it is to be discharged from the engine, so that the steam itvreceived may all be returned to the steam chamber before the escape when so arranged and constructed as to act in unison with the cutoff, so the strength of the air spring is to be so adjusted that when expanded to its full limits it may agree with the pressure down to which it is intended to use the steam to be adjusted and governed by any proper devices.

B are caps or circles which inclose the annular steam chambers and form their periphery, one of their edges being fitted in the groove e e in the plate E which forms the inner side of the steam chambers and at the other edge of said caps or circles are flanges 7L h., extending inward and fitting the outer rim of the part Z (l, which forms the outer side of steam chambers and ends of the steam wheel.

j j, is an opening in the periphery of the steam chamber through which' the abutments are admitted to form connection with the steam wheel.

U, are rods which connect the two caps or circles and tighten them against the steam wheel by means of nuts and screws.

Z, are adjustable cranks which are attached to the main shaft and ends of steam wheel by means of set screws Y, with their rollers X and fixed steam pistons a a, on a line parallel with the main shaft. Said rollers as they revolve with the main steam wheel are alternately brought in contact with t-he inner surface of the ellipses or sway bars D and give them a vibrating motion, and said ellipses being attached to the concave side of the crescent formed balance beams V at the same time gives said balance beams an undulating motion. p p, are pivots or fulcrums on which said balance beams rest.

n n, are slits or grooves cut in the ellipses so they may be slid to the right or left on the set screws 0 o by means of which they are adjusted and tightened, so the main length of the ellipse can be thrown either side the center of the balance beam desired and so by having the ellipses or sway bars of proper length they may be adjust-ed so as to effect a cutoff at most any point desired in the revolution of the piston and at the same time regularly perform its office of admitting steam into the engine at proper periods or points in its revolutions. By

means of the arms or connecting rods o the undulating motion of the balance beams V is communicated to the levers N, which work sliding valves of any of the known form in the steam chest I by means of rods R, such combination being to effect an adjustable cutoff.

K is the main steam steam chest.

S are escape pipes.

J are pipes which conduct the steam alternately to opposite sides of the abutments as the engine is reversed.

H is a roller with its hand lever L and arms M, to which are attached rods Q that work oval slides, Fig. 8, with flanges or projections 71 z' that extend each side the pipe leading to the abutments and so constructed as to alter` nately open and close the steam and escape pipes on opposite sides of the abutment-s as the engine is reversed by a motion of the hand lever.

Operation: Suppose the hand lever L Fig. l to be drawn toward you which would close t-he steam pipes J and open the escape pipes S on the opposite side of the abutments and close the escape pipes and open the steam pipes and admit the steam on the side toward you and cause the steam wheel to revolve in that direction by acting conjointly upon the fixed steam and slidingair pistons which sliding pistons aire forced against confined air until the air becomes as compressed as the steam and so passes on until the roller X on the wrist of the ad justable crank Z comes in contact with one of the arms of the adjustable ellipse or sway bar (D) opposite the place of starting and gives said ellipse or sway bar a vibrating or swinging motion which motion is communicated through the aforedescribed combination to the cutoE valve and closes the same and then as the piston moves onward in its revolution and the force of the steam in the engine becomes diminished by expansion under a cut-off the air spring then having the balance of power gradually drives the steam back again into the `steam chamber, so that it is all returned before the escape takes place. Thus is a reciprocal action kept up between the steam and the spring balance. Then still under a cutoff it passes the abutment and on to the place of starting, where the steam is again let on by the action of the roller on the opposite side of the ellipsis; meantime the steam is acting on the opposite piston in the other apartment of the steam wheel. The above describes the operation of both apartments.

Having thus fully described our invention we will proceed to state what we consider as new and desire to secure by Let-ters Patentof the United States. We do not wish to confine ourselves to any particular number of steam chambers nor to any particular number of pistons in a steam chamber, nor do we wish to confine ourselves to slotted abutments for we do not consider it will alter the nature of our invention whether the pistons pass the abutments by slots in the same or by slots in the steam wheel, butl. We claim the cut-off crank Z and antifriction roller X in' combination with the ellipsis D and balance beam V when so constructed as to alternately open and close cut-olf valves substantially as described and for the purpose of effecting an adjustable cutoff.

2. Ve claim the air spring to steam wheels when so constructed as to have direct influence on the steam piston and by its reciprocal action to maintain a steady even motion of the engine when in unison with the cutoff in the manner and for the purpose substantially as described.

ELIAS MATTESON. WALTER M. PARRIS. HERVEY PARRIS. lVitnesses:

ALEXANDER BLISS, SEYMOUR J. HoLLEY. 

